Three, two, one, ignite! "A flame of light shot into the clouds in the desert Gobi. The Shenzhou 16 manned spacecraft took the Long March 2 F Long March 16 carrier rocket into the air and rushed to the remote Tiangong. This magnificent moment attracted countless Chinese children to tears. At the time of the launch of Shenzhou 16, an exhibition called "Space Memory" was being held in Beijing, more than 1000 kilometers away. Entering the exhibition hall, the first exhibit that catches your eye is the "1059" rocket engine. On November 5, 1960, also in Jiuquan, accompanied by earth tremors and white smoke rising, Dongfeng-1 was successfully launched. 1059 "is the code name for Dongfeng No.1 before it was named. The "treasure of town exhibition" of this exhibition is the real object of China's first Liquid-propellant rocket. Behind it, a picture of the early struggles of China's aerospace industry unfolds slowly, with carefully preserved exhibits conveying the spirit and strength of the older generation of astronauts to future generations. Military reporters visited the exhibition of "Space Memory" - looking up, the starlight chasing stars. They insisted on looking up at the deep space in the hard years. "Today I take the liberty to report a situation to you, please support me." In 1982, a letter was sent to Qian Xuesen, then the deputy director of the Commission of Science, Technology and Industry for National Defense. The writer was a scientific researcher working in the metrological station of China Academy of Launch Vehicle Technology at that time. More than 40 years later, when the reporter asked about the scene at that time, the old man looked at the faded stationery and fell back into memories - "We request to improve the working environment." He said, "This is not for his own comfort." He described the working environment to the reporter at that time: due to the tight office space, equipment such as coating machines and low-frequency vibration tables were forced to be stored outdoors, and expensive imported machines had no storage conditions and could only be stored in universities. Many measuring equipment has high environmental requirements, so I have the cheek to write this letter, "the old man said. At that time, the constant temperature and humidity laboratory of the metering station was not enough, and many projects were worked out by scientific researchers in the right season and at the right time. In that era of material scarcity, researchers overcame countless difficulties and risks with a fire in their chest, and ultimately achieved a career. The old letter paper has turned yellow and brittle, and the neat creases show that it has been carefully preserved for decades. Qian Xuesen answered the letter three days after the letter was sent. In October of the same year, the Ministry of Aerospace issued an approval for the expansion of the measuring station. Nowadays, the units where the elderly worked in the past continue to undertake the research, production, and measurement and testing tasks of components such as China's carrier rockets and Shenzhou spacecraft. Compared to before, the research environment has undergone tremendous changes: the existing research and production area is over 10000 square meters, of which the area of the constant temperature laboratory accounts for nearly half, with over a thousand precision instruments and equipment. A letter allows future generations to understand a corner of the hard work of entrepreneurship back then. There are many similar exhibits in this exhibition. Just behind the exhibition area where this letter is located, a curved glass display cabinet with a whole wall displays computing equipment used by the first generation of astronauts. Abacus, Slide rule, hand computer... It's hard for young people living in the era of rapid development of science and technology to imagine